No.
Malfunction
Name
Display
Code
Unit's
Condition
Possible Causes
Display
Window
4
Freon-lacking
protection
F0
The compr-
essor stops;
the fan mo-
tor keeps on
running.
● Refrigerant is leaking.
● System is blocked
5
Overload
protection
H3
● Ambient operation condition is
bad.
● The evaporator and condenser
are blocked with filth.
● The system is abnormal.
1
8
C
RT1
CN4
TEMP.SENSOR
TUBE
θ
CN1
M2
MOTOR
STEPPING
CN2
CN1
DISPLAY BOARD
AP1
CN3
N1
N AC-L1
MAIN BOARD
AP2
FAN MOTOR
M1
C1
BN
RD
YEGN
PE
POWER
N
L
YEGN
BN
BU
COMP-GL
COMP.
R
C2
S
RD
BU
YE
BU
YEGN
E
P
E
P
CN5
CN1
HUMIDITY
SENSOR
LIQUID LEVEL
SWITCH
CN3